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Rundll32 Open File - Secuity warning message possible infected file


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Hello, I have a problem regarding rundll32.exe

I’m using Windows 7 Home premium 64-bit.

Whenever I log on I receive an Open File – Security warning message trying to access rundll32.exe from the file path: C:\Users\Owner\AppData\Local\Temp\rundll32.exe with an unknown publisher. I have checked the temp folder (with show hidden folders) and I’m unable to find rundll32.exe. I also have checked the Startup folder from the start menu and it’s empty.

From task manager I can see two instances of rundll32.exe

If I click yes to the message the following occurs: An application called Malwarebytes’ Anti-Malware requests execution from the file path: C:\Users\Owner\AppData\Roaming\mbam.exe. Selecting yes results in an error message: "MBAM_ERROR_ENUMERATE_LANGUAGES(3,0) the system cannot find the path specified". This error message is immediately followed by another application request prompt from Malwarebytes’ Anti-Malware, only this time the file path is different: C:\Users\Owner\AppData\Local\Temp.... Selecting yes again results in the same error message "MBAM_ERROR_ENUMERATE_LANGUAGES(3,0) the system cannot find the path specified", however after this there are no more prompts.

Navigating to (C:\Users\Owner\AppData\Roaming) shows two new files:

Chrtmp 0 kb 
mbam.exe 1,066 kb

Navigating to (C:\Users\Owner\AppData\Local\Temp) shows:

%temp%.exe 1,066 kb and has a description Malwarebytes’ Anti-Malware

Navigating to (C:\Users\Owner\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup) shows a new file called rundll32.exe with a pink folder icon.

I can remove these files without any issues and my system’s stability is normal, however the Open File – Security warning message appears persistently when logging into windows. I ran a full system scan with McAfee but everything reported normal. I scanned the newly created files using online file scanners such as www.virustotal.com/ with also reported nothing. Any assistance in this matter?

Thank you sincerely you for help.

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Hello TheVoid: :welcome:

Those are very compelling indications that your system has been infected and here are the steps needed to get your computer cleaned:

Please read the following so that you can begin the cleaning process:

You have 3 Options that you can choose from as listed below:

  • Option 1 —— Free Expert advice in the Malware Removal Forum
  • Option 2 —— Paying customer -- Contact Support via email
  • Option 3 —— Premium, Fee-Based Support


As we don't deal with malware removal in the
PC Help subforum
, you need to start your own topic in the
Malware Removal - HijackThis Logs subforum
so a qualified expert can help you fix any malware related problems/infections you may have.

  • Please read and
    , skipping any steps you are unable to complete. Then post a

  • After posting your new post, make sure under
    , you select
    Track this topic
    and choose
    Immediate Email Notification
    , so that you're alerted when someone has replied to your post.

  • One of the
    there will give you one-on-one assistance when one becomes available.

  • Please refrain from making any further changes to your computer such as (Install/Uninstall programs, use special fix tools, delete files, edit the registry, etc...) unless advised by a malware removal helper. Doing so can result in system changes which may hinder the attempts by a helper to clean your machine.

Please DO NOT post back to (bump) your topic within the first 48 hours.

Replying to your own posts changes the post count and helpers are looking for topics with zero replies. If you reply to your own post helpers may think that you're already being helped and thus overlook your post.
    • If there is no reply from any experts after 48 hours, you can reply to the topic, asking for help again.


    • You may send a Private Message to a Moderator asking for assistance.


Alternatively, as a paying customer, you can contact the help desk at


If you would like to use our Malwarebytes Premium Services, Comprehensive solutions to all your computer support needs—from installation and set-up to troubleshooting and tune-ups go to our
support site.

Please be patient, someone will assist you as soon as it is possible.

PS: Please use the Add-Reply.png button instead of other ones when you start replying. :)

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